William m



(No Model.) 1 W M. DWIGHT.

PRESSER ROLL FOR PLANING MACHINES.

Patented Nov 11 we I WILLIAM M. DWIGHT, OF DETROIT, MICHIGAN, ASSIGNOR TO THE ROBERTS DUPLEX PLANING MAOHINE TOOL COMPANY, OF SAME PLACE.

PRESSER-ROLL FOR PLANING-MACHINES.

PECIPIGA'lION forming part of Letters Patent No. 307,926, dated November 11, 1884. Application filed September 10,1884. (No model.)

To all whom it may concern.-

Be it known that 1, WILLIAM M. DWIGHT, of Detroit, in the countyof Wayne and State of Michigan, have invented new and useful Improvements in Planing and Matching Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, which form a part of this specification.

This invention relates to an improvement in planing and matching machines for making flooring and ceiling, and its specific object is to form an improvement on a machine for this purpose for which I have applied for Letters Patent. In this machine a division plate or guide is centrally secured upon the bed of the machine and the stuff is fed and operated upon on each side of this guide, and the object of this invention is to provide a suitable construction of feed-rolls in connec tion therewith, so that the boards on each side of the division-guide have feed-rolls which accommodate themselves independently of each other to boards of varying thickness.

The invention consists in the construction and arrangement of the upper feed-rolls, all as hereinafter described.

In the drawings, Figure l is a diagram plan view of the machine. Fig. 2 is a longitudinal section, and Fig. 3 is a cross-section thereof on line 00 0:.

A is the bed of the planing-machine, and B is a division plate or guide centrally secured thereto.

0 and D are cutter-heads, which carry the usual planer-knives for dressing the upper and lower sides of the boards fed on either side of the divisionguide, and which also carry other knives for tonguing the boards upon their inner edges.

E are cutter-heads for grooving the boards upon their outer edges.

The feed-rolls are arranged in the usual manner, one set being placed near the delivery end and two sets at the front end. The

rear set consists of two live-rolls of the usual kind; but the two front sets are constructed in a novel manner, their construction being as follows: The lower roll, F, of each set is constructed, arranged, and connected in the usual manner; but instead of the usual upper roll, as in the ordinary construction, two shorter rolls, H, one for each half of the bed, are employed. These rolls H are j ournaled independently of each other inboxes I. J are standards; K, a yoke, and P screws forraising or lowering the yoke. These devices are of the ordinary construction, and their operation in connection with a single roll journaled in the ends of the yoke is so well understood as to obviate any further description. The yoke K, I now provide about its middle with hangers L, in which the inner boxes of the rolls H are housed, so as to adapt them to be moved vertically up independently of each other. The outer boxes of the rolls H are loosely connected to the ends of the yoke K by means of the plates M,which only compel the boxes to follow any vertical up or down motion of the yoke.

N and N are weights, the former weighting down the outer boxes and the latter the inner boxes of the rolls. The proper motion is imparted from the lower feed-rolls to the upper ones by the usual means of a series of connected cog-wheelsone for each roll. In practice, if boards are fed at either side of the divisionplate, each upper feed-roll, H, can adjust itself to varying thicknesses of the boards independent of its companion roll. The tilting of the yoke created by the raising or lowering of one roll cannot affect its companion roll,owing to the manner in which the plates M connect the yoke with the outer boxes of the rolls H.

By making use of the yoke Kin the manner I have described I gain the great advantage that I can raise or lower the upper feed-rolls by the same devices which are now universally used in planing-machines for effecting a simultaneous movement of the two screws 1?.

The applicability of the particular construe tion of feed-rolls herein described to the'ordinary styles of planing-machines is also of great advantagein connection with theimprovement for which it is specially designed, and which partakes of the same character.

' I am aware of the Patents Nos. 217 ,238 and 303,425, and make no claim to the construction shown therein as forming part of my invention.

hat I claim as my invention is 1. In a planing-machine substantially as described, the yoke K, provided with the central hangers, L, and means, substantially as described, for raising and lowering said yoke, in combination with the feed-rolls H, journaled independently of each other in boxes I, the outer ones of which are hung to the outer ends of the yoke and the inner ones of which are held by the central hangers, all so arranged that the rolls can adjust themselves independently of each other, but may be simultaneously raised or lowered by raising or lowering the yoke, substantially in the manner described.

2. In a planing-machine substantially as described, two upper feed-rolls, H H, journaled in boxes independently of each other, and in- \Vitnesses:

H. S. SPRAGUE, CHARLES J. HUNT. 

